From 6668ed271eaefaa63e686bdfbedaeb7b8e492722 Mon Sep 17 00:00:00 2001 From: Kumar Kartikeya Dwivedi Date: Fri, 4 Sep 2026 10:43:19 +0200 Subject: selftests/bpf: Reject graph kptr use after RCU unlock Add a sleepable verifier test that loads a graph-node local kptr in an explicit RCU read-side critical section, then passes its node to bpf_rbtree_remove() after the section ends. Before the verifier fix, the stale NON_OWN_REF flag makes the node look like a live borrowed reference and the program is accepted. After the fix, the pointer is demoted without NON_OWN_REF and the graph kfunc argument is rejected. Also exercise a graph kptr loaded while a spin lock provides implicit RCU protection. The pointer must be invalidated when the lock is released, which guards the required ordering between non-owning-reference invalidation and RCU demotion. Update the existing fault-protected load test state description. The post-unlock pointer no longer carries NON_OWN_REF, but remains readable because the load is rewritten to use BPF_PROBE_MEM. Signed-off-by: Kumar Kartikeya Dwivedi Link: https://lore.kernel.org/r/20260904084325.52250-7-memxor@gmail.com Signed-off-by: Alexei Starovoitov --- drivers/hid/intel-thc-hid/Makefile | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 drivers/hid/intel-thc-hid/Makefile (limited to 'drivers/hid/intel-thc-hid/Makefile') diff --git a/drivers/hid/intel-thc-hid/Makefile b/drivers/hid/intel-thc-hid/Makefile new file mode 100644 index 000000000..f1182253b --- /dev/null +++ b/drivers/hid/intel-thc-hid/Makefile @@ -0,0 +1,23 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile - Intel Touch Host Controller (THC) drivers +# Copyright (c) 2024, Intel Corporation. +# +# + +obj-$(CONFIG_INTEL_THC_HID) += intel-thc.o +intel-thc-objs += intel-thc/intel-thc-dev.o +intel-thc-objs += intel-thc/intel-thc-dma.o +intel-thc-objs += intel-thc/intel-thc-wot.o + +obj-$(CONFIG_INTEL_QUICKSPI) += intel-quickspi.o +intel-quickspi-objs += intel-quickspi/pci-quickspi.o +intel-quickspi-objs += intel-quickspi/quickspi-hid.o +intel-quickspi-objs += intel-quickspi/quickspi-protocol.o + +obj-$(CONFIG_INTEL_QUICKI2C) += intel-quicki2c.o +intel-quicki2c-objs += intel-quicki2c/pci-quicki2c.o +intel-quicki2c-objs += intel-quicki2c/quicki2c-hid.o +intel-quicki2c-objs += intel-quicki2c/quicki2c-protocol.o + +ccflags-y += -I $(src)/intel-thc -- cgit v1.3.1